Multiple File Uploads

Hey, I'm looking for a good and complete how to to implement multiple
file uploads in a form. I've been looking for hours now, trying a few
snippets or bits or various forums, and I'd love it if someone who had
a real good grasp on ruby could show me (and everyone else) a ruby way
to implement it. so far all I've found is hacks that don't really
work. I'm familiar with file_column, acts_as_attachment, and
attachment_fu and have gotten all of them to work with one file. I've
even tried combing through mephisto's code, but i can't make what Rick
does there work.

Any help would be awesome.

This'd be great to know! Any recommendations?